Friedrich von martini



(No Mode.) Y F. VON MARTINI..

EMBRGIDBRING MACHINE. No. 494,744. Patented Apr, 4, 1893.

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UNITED STATES PATENT EErcEe FRIEDRICH VON MARTINI, OF FRAUENFELD,SVITZERLAND.

EMBROIDERING-MACHINE.

SPCIFIGATION forming part of Letters Patent No. 494,744, dated April 4,1893.

Application iiletl November 14, 1892. Serial No. 451,866. (No model.)

the following is a specification.

In operating the Heilmann embroidering machines entirely by manual laborthe needle racks are moved toward or from the fabrics by hand, byturning a crank and the changes required in the gearing for intermittentmotion of the front or rear accomplished by the operator by means oftreadles.

The speed at which Heilmanns said emhroidering-machine can work islimited by the quality of the thread used, which wears appreciably whendrawn quickly through the material; but this speed is never attained onthe hand embroidering-machine at present in use, in consequence of theinsufficient power of the embroiderer.A

The object of this invention is to provide an attachment to the same,whereby the speed of the machine is increased and the parts of themachine are operated by power. To attain this object, the operator isrelieved of work, which has heretofore been done by hand and whichlimits his capacity for work, so that he has left to him, li-ttle morethan the control or regulation of the machine, the mechanical workproper being performed by driving power placed at his disposal, suitableapparatus being provided by which the direct-ion of the motion and thespeed of the machine is completely under the control of the embroiderer.For attaining the object in view as above indicated, thedriving-mechanism is provided with a coupling capable of being placedinto and out of engagement and whereby the various intermittent changesof movement required for embroidering can be effected and maintained.Apparatus for this purpose can be constructed in various ways.

ln the accompanying drawings, Figure l is a front elevation. Fig. 2 is aside-elevation of the driving-mechanism for a hand-embroidering-machineconstructed according to my invention. Fig. 3 is a section to alargerscale, taken through the crank handle and crank shaft.

Similar numerals of reference indicate corresponding parts.

On the crank-shaft l carrying the crankhandle, and at both sides of thehandwheel 2, are mounted small loose beltpulleys 3 4. which are rotatedfrom a counter-shaft in opposite directions. These pulleys 3 and et areprovided with friction cones adapted to engage with suitable frictioncones on the handwheel 2 and to cause the latter to rotate in one or theother direction according as it is pressed into one or the other cone.The handwheel 2 is not keyed fast on the crank-shaft l but its bore isformed with a screw-thread and a corresponding screw-thread is formed onthe part 5 of the crank-shaft. On turning the crank-handle thehand-wheel 2, since the machine offers the necessary resistance, isshifted on the part 5 to the right or to the left according to thedirection of the rotation of the crank-handle until it arrives andispressed against the pulley 3 or e by which it is then rotated. Indriving by friction, the speed of the wheel 2 can be regulated bypressing more or less on the crank-handle; also by moving the wheel 2 inthe opposite direction a braking action may be exerted upon the movingparts so as to bring them to rest, and also to complete the pull ortightening action exerted on the threads. The speed of the countershaftfor driving the pulleys 3 and 4 may be made adjustable by suitablegearing. `For certain cases however, it is necessary that the hand-wheel2 and the crank-handle'shall be capable of being coupled firmly togetherin order that the machine may be used for a longer or shorter periodexactly like the hand einbroidering-machine at present in ordinary use.These cases occur, for example when the operator desires to complete thepull by hand in boring, punching, and festooning, in iinishing o theshort remnants of thread and in adjusting the carriages. For thispurpose, the following arrangement is employed:

In the crank-handle 18 is located an endwise movable pin 6, whichactuates a lever 7, so as to move a pin 8 along a slot in the crankshaft1, with which the pin 8 is compelled to rotate. On one side of thehand-wheel 2, suitable grooves 9 are made for the entry of the piu 8. pIt now the operator, after the friction driving is stopped, presses uponthe projecting knob 10 of the handle 18, the pin 8 will enter the slotin the hand-wheel and connect it with the crank -handle firmly together.The motive power provided can also be employed by the operator foraiding or effecting the changes required in the gearing for theintermittent motion of the front and rear carriages, so that he is alsopartly or wholly relieved of this mechanical work. For this purpose thearrangement is such that when the operator commences the delivery bypressing on the corresponding treadle 11, the carrier-wheel 12 willbegin to move out of gear with the teeth of the whee113 which operatesthe rear carriage and toward the wheel 14 which operates the frontcarriage and will engage a tooth 15 fixed to the framing of theembroidering-machine as soon as it is clear of the wheel13; and thehand-Wheel 2 continuing to be rotated by the motive force, will causethe shifting lever 16 to turn until the wheel 12 gears with the wheel14. The tooth 15 is arranged to be readily thrown into and out ofoperation, as required, by means of a handle 17. Thus by the meansdescribed the operators foot will be relieved of a considerable amountof work.

Having thus described my invention, I claim as new and desire to secureby Letters Patent-'- 1. InV a hand-power embroidering-machine, thecombination, with a crank-shaft carrying the usual hand-wheel,power-driven pulleys on the crank-shaft adjacent to the hand-wheel, andmeans for coupling the said hand-wheel with either power-driven pulleys,substantially as set forth.

2. In an embroidery-machine, the combination, with two friction pulleysand means for rotating them in opposite direction from a power shaft, ofa toothed friction-wheel mounted between the two pulleys and adapted tobe engaged with either, gearing on said friction-wheel for transmittingmotion to other gear-wheels, and means for bringing said friction-wheelin frictional contact with either of said friction-pulleys,substantially as set forth.

3. In an embroidery-machine, the combination, with a crank-shaft and atoothed friction-wheel on said crank-shaft, means for shifting thepulley on the crank-shaft in the direction of the length of saidcrank-shaft by turning said crank-shaft and two frictionpulleys mountedloosely on the crank-shaft, at opposite sides of the friction-wheel, and

means for rotating said pulleys in opposite direction from a powershaft, substantially as set forth.

4:. In an embroidery-machine, the combination, with a crank-shaft, andafriction-wheel mounted to turn on said shaft, of two friction-pulleys,and means for locking the friction-wheel on the crank-shaft,substantially as set forth.

5. In an embroidery-machine, the combination, with a crank-shaft, and afriction-wheel on the same, of a lever pivoted in the crank, a pinprojecting from one end of said lever through the crank-handle, a rodconnected with the opposite end of the lever and mounted movably inl thecrank-shaft, and a crosspin projecting from said rod and adapted toengage the friction-wheel on said crank-shaft, substantially as setforth.

6. Inan embroidery-machine, the combination, with a foot-lever, of alever pivoted on the frame of the machine and in operating connectionwith said foot-lever, a gear-wheel on said lever, gear-wheels on thefront and rear carriages with which gearwheels the gear-wheel on thepivoted lever can engage, a crank-shaft mounted on said lever, afriction-wheel mounted ou said crank-shaft, two f riction-pulleysmounted looselyon said crankshaft means for engaging the friction-wheelwith either of the friction-pulleys, means for rotating saidfriction-pulleys in opposite direction from a power shaft, thegear-wheel on the friction-Wheel engaging the gear-Wheel on ,the pivotedlever, and an adjustable tooth projecting from the machine frame andadapted to engage the gear-wheel on the pivoted lever, substantially asset forth.

7. In an embroidery-machine, the combination, with a pivoted lever onthe machine frame, of a foot-lever in operating connection with saidpivoted lever, a gear-wheel on said pivoted lever, means for rotatingsaid gearwheel, an adjustable tooth on the machine frame with whichtooth the gear-wheel on the pivoted lever can engage, and gear-wheels onthe front and rear carriages of the embroiderymachi1e,'which gear-wheelscan be engaged with the gear-Wheel on the pivoted lever, substantiallyas set forth.

In testimony whereof I hereunto sign my name, in the presence oftwosubscribing witnesses, this 13th day of October, 1892.

v FRIEDRICH VON MARTINI.

Witnesses:

EMIL BLUM, H. LABBARD.

lOO

